samples/Test.java
public class Test {

    public int a = 3; 
    static Integer si = 6;
    String s = "Hello World!";

    public static void main(String[] args) {
        Test test = new Test();
        test.a = 8;
        si = 9;
    }

    private void test() {
        this.a = a;
    }
}
